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><A
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></A
>Chapter 39. <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
> - <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> Procedural Language</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
>39.1. <A
HREF="plpgsql-overview.html"
>Overview</A
></DT
><DD
><DL
><DT
>39.1.1. <A
HREF="plpgsql-overview.html#PLPGSQL-ADVANTAGES"
>Advantages of Using <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
></A
></DT
><DT
>39.1.2. <A
HREF="plpgsql-overview.html#PLPGSQL-ARGS-RESULTS"
>Supported Argument and Result Data Types</A
></DT
></DL
></DD
><DT
>39.2. <A
HREF="plpgsql-structure.html"
>Structure of <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
></A
></DT
><DT
>39.3. <A
HREF="plpgsql-declarations.html"
>Declarations</A
></DT
><DD
><DL
><DT
>39.3.1. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-PARAMETERS"
>Declaring Function Parameters</A
></DT
><DT
>39.3.2. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-ALIAS"
><TT
CLASS="LITERAL"
>ALIAS</TT
></A
></DT
><DT
>39.3.3. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-TYPE"
>Copying Types</A
></DT
><DT
>39.3.4. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-ROWTYPES"
>Row Types</A
></DT
><DT
>39.3.5. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-RECORDS"
>Record Types</A
></DT
><DT
>39.3.6. <A
HREF="plpgsql-declarations.html#PLPGSQL-DECLARATION-COLLATION"
>Collation of <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
> Variables</A
></DT
></DL
></DD
><DT
>39.4. <A
HREF="plpgsql-expressions.html"
>Expressions</A
></DT
><DT
>39.5. <A
HREF="plpgsql-statements.html"
>Basic Statements</A
></DT
><DD
><DL
><DT
>39.5.1. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-ASSIGNMENT"
>Assignment</A
></DT
><DT
>39.5.2. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-SQL-NORESULT"
>Executing a Command With No Result</A
></DT
><DT
>39.5.3. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-SQL-ONEROW"
>Executing a Query with a Single-row Result</A
></DT
><DT
>39.5.4. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN"
>Executing Dynamic Commands</A
></DT
><DT
>39.5.5. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-DIAGNOSTICS"
>Obtaining the Result Status</A
></DT
><DT
>39.5.6. <A
HREF="plpgsql-statements.html#PLPGSQL-STATEMENTS-NULL"
>Doing Nothing At All</A
></DT
></DL
></DD
><DT
>39.6. <A
HREF="plpgsql-control-structures.html"
>Control Structures</A
></DT
><DD
><DL
><DT
>39.6.1. <A
HREF="plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING"
>Returning From a Function</A
></DT
><DT
>39.6.2. <A
HREF="plpgsql-control-structures.html#PLPGSQL-CONDITIONALS"
>Conditionals</A
></DT
><DT
>39.6.3. <A
HREF="plpgsql-control-structures.html#PLPGSQL-CONTROL-STRUCTURES-LOOPS"
>Simple Loops</A
></DT
><DT
>39.6.4. <A
HREF="plpgsql-control-structures.html#PLPGSQL-RECORDS-ITERATING"
>Looping Through Query Results</A
></DT
><DT
>39.6.5. <A
HREF="plpgsql-control-structures.html#PLPGSQL-FOREACH-ARRAY"
>Looping Through Arrays</A
></DT
><DT
>39.6.6. <A
HREF="plpgsql-control-structures.html#PLPGSQL-ERROR-TRAPPING"
>Trapping Errors</A
></DT
></DL
></DD
><DT
>39.7. <A
HREF="plpgsql-cursors.html"
>Cursors</A
></DT
><DD
><DL
><DT
>39.7.1. <A
HREF="plpgsql-cursors.html#PLPGSQL-CURSOR-DECLARATIONS"
>Declaring Cursor Variables</A
></DT
><DT
>39.7.2. <A
HREF="plpgsql-cursors.html#PLPGSQL-CURSOR-OPENING"
>Opening Cursors</A
></DT
><DT
>39.7.3. <A
HREF="plpgsql-cursors.html#PLPGSQL-CURSOR-USING"
>Using Cursors</A
></DT
><DT
>39.7.4. <A
HREF="plpgsql-cursors.html#PLPGSQL-CURSOR-FOR-LOOP"
>Looping Through a Cursor's Result</A
></DT
></DL
></DD
><DT
>39.8. <A
HREF="plpgsql-errors-and-messages.html"
>Errors and Messages</A
></DT
><DT
>39.9. <A
HREF="plpgsql-trigger.html"
>Trigger Procedures</A
></DT
><DT
>39.10. <A
HREF="plpgsql-implementation.html"
><SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
> Under the Hood</A
></DT
><DD
><DL
><DT
>39.10.1. <A
HREF="plpgsql-implementation.html#PLPGSQL-VAR-SUBST"
>Variable Substitution</A
></DT
><DT
>39.10.2. <A
HREF="plpgsql-implementation.html#PLPGSQL-PLAN-CACHING"
>Plan Caching</A
></DT
></DL
></DD
><DT
>39.11. <A
HREF="plpgsql-development-tips.html"
>Tips for Developing in <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
></A
></DT
><DT
>39.12. <A
HREF="plpgsql-porting.html"
>Porting from <SPAN
CLASS="PRODUCTNAME"
>Oracle</SPAN
> PL/SQL</A
></DT
><DD
><DL
><DT
>39.12.1. <A
HREF="plpgsql-porting.html#AEN55386"
>Porting Examples</A
></DT
><DT
>39.12.2. <A
HREF="plpgsql-porting.html#PLPGSQL-PORTING-OTHER"
>Other Things to Watch For</A
></DT
><DT
>39.12.3. <A
HREF="plpgsql-porting.html#PLPGSQL-PORTING-APPENDIX"
>Appendix</A
></DT
></DL
></DD
></DL
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